The Temple of Atzoatl can hand you 150 chaos on a good run or 15 on a bad one. That gap isn’t down to RNG — it’s which rooms you upgrade and which architects you kill.
Temporal Incursion in PoE2 (the “Fate of the Vaal” system, made a permanent core feature in patch 0.5.0 on May 29, 2026) puts that decision in your hands eleven times before each temple opens. Most guides say “target S-tier rooms” without telling you precisely which rooms rank where, or how 0.5.0 reshuffled that value. This guide gives you the exact priority matrix, the apex room tier list, and a playstyle breakdown so you stop leaving chaos on the table.
Verified on patch 0.5.2 (June 12, 2026) — no incursion-specific changes shipped in 0.5.2.
For a complete overview of everything PoE2 endgame, see our Path of Exile 2 Beginner’s Guide.
Quick Start: 8 Steps Before Your First Temple
- Collect Energised Crystals from Vaal Beacons starting in Act 3. You need 11 crystals to build a complete temple run. If you’re in endgame maps, use Temple Precursor Tablets — they guarantee Beacon spawns in your mapped zones.
- Enter each incursion and pause before swinging. Check both architects’ affiliation first. One is defending the room; one is invading. Your kill choice shapes the whole temple.
- Resident architect (bottom-left) = changes the room type. Kill them if you want the invading architect’s room in place of the current one.
- Non-resident architect (top-right) = upgrades the current room’s tier. Kill them to push the existing room from T1 to T2, or T2 to T3.
- Trace the path to Architect’s Chamber before anything else. If killing either architect would cut the only route through, preserve connectivity regardless of room value. A T3 Locus of Corruption is worthless if Atziri is unreachable.
- Primary targets: Locus of Corruption and Thaumaturge’s Cathedral. These are your S-tier rooms. See the full matrix below for everything else.
- Save Quipolatl’s Medallions. These upgrade a room one tier outside of incursion — spend them only on your highest-priority rooms you couldn’t reach T3 during the 11 runs.
- Don’t attempt the old snake strategy. Since 0.5.0, rooms that can’t be removed without disconnecting the temple now downgrade to path corridors instead of being deleted. The exploit is gone.
How Temporal Incursion Works
A temporal incursion drops you into the past version of the Temple of Atzoatl. Inside, two Vaal Architects are fighting over a single room. You have a timed window to kill one — and that kill determines both the room’s type and its tier in the final, present-day temple.
Eleven incursions shape one complete temple. The layout is a 9×9 grid with Atziri’s Chamber at the far end. Reaching her requires passing through the Royal Access Chamber (mandatory to unlock Atziri) and the Architect’s Chamber (mid-boss, the source of Medallion drops). Both must be on a connected path from your entry point or the run is wasted.
Storage caps as of 0.5.0: 60 Energised Crystals and 6 Medallions. Those Medallion slots matter — Commander’s Headquarters (T3 Commander line) is the best source in-run, so prioritising that room line pays dividends beyond the room itself.
Rooms normally cap at Tier 3. Tier 4 upgrades are available only after unlocking the corresponding node on the Temple Atlas Passive Tree — a significant Atlas investment worth making if you’re farming temples at volume.
The Upgrade vs Switch Decision (Never Waste an Incursion)
Every incursion forces the same binary: upgrade the existing room one tier (kill non-resident) or swap it for a different type (kill resident). The correct choice depends on three checks, in this order:
Check 1 — Connectivity. If either kill would break the path to Architect’s Chamber, take the architect who keeps the route open. No debate, no exceptions. A connected T1 room beats an isolated T3.
Check 2 — Current room tier vs invading room value.
- Current room is S-tier (Crimson Hall, Spymaster’s Study): upgrade unless the invader is also S-tier and you don’t have it yet.
- Current room is C-tier or D-tier: switch if the invader offers A-tier or above.
- Both architects offer B-tier or below: upgrade the current room. A T3 mediocre room is still worth more than a T1 good room in most cases.
Check 3 — Temple layout saturation. Already have T3 Locus of Corruption? A second Crimson Hall offer loses half its value. Shift focus to upgrading support rooms (Spymaster’s Study, Thaumaturge’s Laboratory) that multiply the rooms you already own.
The single most common mistake is swapping a T2 room to a T1 because the invading room “sounds better.” That erases two incursions of upgrade progress. The invading room always starts at T1 — factor that in.
Room Upgrade Priority Matrix
This matrix ranks all primary room lines by their T3 value — the tier you’re actually trying to reach across 11 incursions. “Best For” reflects what the room optimises; upgrade priority should still follow the player-type table below.
| T3 Room Name | Upgrade Line (T1 → T2 → T3) | Priority | Key T3 Benefit | Best For |
|---|---|---|---|---|
| Locus of Corruption | Crimson Hall → Catalyst of Corruption → Locus | S | 60% chance of extra corrupted modifier on items; device available in-room | Item crafting, temple sell value |
| Thaumaturge’s Cathedral | Laboratory → Cuttery → Cathedral | S | Gem corruption device + 30% boost to adjacent corruption rooms | Gem farming, build-enabling items |
| Omnipresent Panopticon | Spymaster’s Study → Hall of Shadows → Panopticon | S | +30% effect on Garrisons, Commanders, Armouries, Smithies, Legion Barracks | Temple meta-scaling, seller strategy |
| Commander’s Headquarters | Commander’s Chamber → Commander’s Hall → Headquarters | A | 60% rare effectiveness; primary Medallion drop source | Medallion farming, self-runners |
| Grand Phylactory | Chamber of Souls → Core Machinarium → Phylactory | A | 50% gold increase, 60% item rarity, Soul Core corruption device | Raw currency + rarity |
| Kishara’s Vault | Non-upgradeable special room | A | Large currency stash — instant value on run | Currency farming |
| Solar Nexus | Dynamo → Shrine of Empowerment → Solar Nexus | A | 60% construct effectiveness + extra Corrupted Abomination spawn | Construct-heavy layouts |
| Golden Forge | Bronzeworks → Chamber of Iron → Golden Forge | B | 60% item rarity + quality-above-20% enhancement bench | Item quality + rarity stacking |
| Hall of War | Guardhouse → Barracks → Hall of War | B | 20% more monster packs + 30% normal monster effectiveness | Density-focused runs |
| Surgeon’s Symphony | Surgeon’s Ward → Surgeon’s Theatre → Symphony | B | 40% unique monster effectiveness; limb modification access | Unique drop farming |
| Crucible of Transcendence | Prosthetic Research → Synthflesh Sanctum → Crucible | C | 40% experience gain | Leveling runs only |
| Elite Legion | Legion Barracks → Viper’s Loyals → Elite Legion | C | 60% rare monster increase | Situational; overshadowed by density rooms |
Rooms not listed (Gallery/Armoury line) provide narrow value at T3 without significant external synergy. Treat them as D-tier filler rooms — upgrade only if you have no better options in the incursion.
Apex Room Tier List — Post-0.5.0 Meta
“Apex rooms” in the community shorthand means the T3 rooms that drive temple sell prices and direct crafting returns. Three rooms account for the majority of any temple’s trade value in the current meta.
Locus of Corruption — Still the Benchmark
At T3, the Locus device gives items a 60% chance to receive an additional corrupted modifier. The four possible outcomes — item destroyed, all sockets turn white, item becomes a rare with two influenced bases, or item gains two corrupted implicits — haven’t changed, but the 0.5.0 reward room buffs increased the loot quality from defeating the Architect on the way in. Community benchmarking across optimised T3 temples puts a Locus-containing temple at a 40–60 chaos premium over equivalent temples without it. It’s the single room that determines whether you sell a temple or run it for scraps.
Thaumaturge’s Cathedral — Now an S-Tier Target
In PoE1, the gem corruption room (Doryani’s Institute) was broadly A-tier. In PoE2’s implementation, Thaumaturge’s Cathedral does two jobs simultaneously: it provides the gem corruption device (enabling level 21 / quality gems, which are build-enabling items that command consistent trade prices) and it boosts adjacent corruption rooms by 30% at T3. That second function is what elevates it to S. A Locus of Corruption sitting next to a T3 Cathedral effectively gains 30% efficiency at no extra incursion cost. The combination is the seller’s gold standard.
Omnipresent Panopticon — The Early Upgrade Priority
The Panopticon’s S-tier designation surprises players expecting a direct-drop room at the top. Its mechanism is indirect: the 30% bonus to five adjacent room families (Garrison, Commander, Armoury, Smithy, Legion Barracks) turns a mid-tier temple into a high-tier one without requiring those rooms to individually reach T3. In practice, a T2 Garrison adjacent to a T3 Panopticon outperforms a standalone T3 Garrison in total efficiency. This makes the Spymaster line your correct upgrade focus for incursions 1–5, before you start pushing the Corruption line in incursions 6–11.
What’s Fallen Off — Grand Phylactory
The Grand Phylactory (T3 Sacrifice/Alchemy line) was an A-tier room pre-0.5.0 and remains A-tier — but the gap between it and the S-tier trio has widened. Its raw currency output is consistent, its item rarity bonus stacks well, and the Soul Core corruption device provides niche value. The issue is opportunity cost: if you’re spending incursions upgrading the Phylactory line over the Cathedral or Corruption line, you’re trading a direct crafting value room for a currency drip room. Run it when you have it; don’t sacrifice S-tier room lines to force it.
For more on what currencies drop from each room and how to prioritise your farm goals, see our PoE2 currency farming guide and the currency tier list.
What 0.5.0 Changed (and Why Old Guides Are Wrong)
If you’re following a guide written before May 29, 2026, watch for these outdated assumptions baked into the advice.
The Snake Strategy Is Patched
Pre-0.5.0, experienced players would intentionally destabilise rooms in a deliberate layout to clear garbage rooms while preserving connectivity — the “snake” configuration. This was removed: rooms that would be destabilised but can’t be deleted without disconnecting the temple now downgrade to path corridors instead. The snake strategy is gone. Plan your layout with linear upgrade paths in mind, not collapse sequencing.
Tier 4 Rooms Exist Now
Investing specific nodes on the Temple Atlas Passive Tree unlocks Tier 4 on individual room lines. For players farming temples at volume, T4 rooms offer meaningfully increased returns — the GGG description is “deeper specialisation.” The Atlas investment is significant enough that casual players should ignore T4 entirely and focus on optimising T3 coverage. For dedicated Fate of the Vaal farmers running 5+ temples per session, the Atlas tree is worth the passive allocation. See our Atlas progression guide for the full passive tree breakdown.
Temple Precursor Tablets
New item type in 0.5.0. These guarantee Vaal Beacon spawns in your mapped zones, eliminating the need to manually hunt Beacons. If you’re farming temples efficiently, these are a meaningful time saving — the difference between finding 11 Beacons in 11 maps versus hunting across 20+.
Vaal Infusers Now Have Four Types
The original single Vaal Infuser was split into four item-type-specific versions: Armourer’s (armour), Blacksmith’s (martial weapons), Arcanist’s (wands and staves), and Catalysing (jewellery). All require 20%+ item quality before use. This affects post-temple crafting decisions and Infuser value at the end of your run — not the incursion room priority itself, but worth knowing before you try to use an Armourer’s Infuser on a weapon.
Which Strategy Fits Your Playstyle?
| Player Type | Primary Goal | Priority Rooms | Skip / Deprioritise |
|---|---|---|---|
| New Player | Complete the temple and reach Atziri reliably | Royal Access Chamber (mandatory), any S-tier if the path allows it | Don’t sacrifice connectivity for value rooms — a broken path means zero return |
| Casual (1–3 temples/week) | Consistent chaos per session without optimisation overhead | Locus of Corruption + Kishara’s Vault (highest direct value, lowest complexity) | Skip Crucible of Transcendence unless you’re actively leveling — XP rooms waste time at cap |
| Optimizer / Seller | Maximum sell price per temple for trade | Locus + Thaumaturge’s Cathedral + Omnipresent Panopticon (triple-S layout) | Garrison/Legion lines unless Panopticon is already T3 and you’re building its family |
| Self-Runner | Maximum extracted loot from running temples personally | Locus + Grand Phylactory + Commander’s Headquarters (direct drops + Medallion income) | Skip sell-only rooms; Medallion income from Commander’s line compounds over time |
If you’re brand new: the single most important habit is tracing the path to Architect’s Chamber before every architect kill. You can build a T3 Locus of Corruption across 10 incursions and lose all of it if incursion 11 breaks your only route to Atziri. Connectivity is the foundation that everything else builds on.
If you’re optimising for trade value: a temple with Locus of Corruption plus Thaumaturge’s Cathedral at T3 consistently commands a 60–100 chaos premium over single-room temples. The two rooms synergise directly (Cathedral’s 30% corruption boost applies to Locus), and buyers know it. Pair them in adjacent positions whenever the layout allows.
Frequently Asked Questions
Should I run temples myself or sell them?
Sell if you have T3 Locus of Corruption or T3 Thaumaturge’s Cathedral and don’t have the build to safely clear high-tier temple content. The sell premium for S-tier temples is real — community benchmarks put it at 40–100 chaos above baseline depending on the combination. Self-run if you’re comfortable in the content and want to capture the upside of a lucky corruption result. The risk-adjusted value typically favours selling for newer characters and self-running for well-geared ones.
Do I need Atlas passives for temples to be profitable?
No. A standard 11-incursion temple with one S-tier room is profitable without any Atlas investment. Atlas passives become worthwhile once you’re farming multiple temples per session and want either T4 room access or guaranteed Beacon spawns from Precursor Tablets. Don’t delay farming while waiting to spec into the Atlas tree.
Can I get multiple S-tier rooms in one temple?
Yes — and it’s the goal for serious sellers. Locus of Corruption plus Thaumaturge’s Cathedral in the same temple is achievable if both room lines appear in your 11 incursion offerings. Adding Omnipresent Panopticon as a third S-tier in an adjacent position is the gold standard: three S-tier rooms in one temple, with Panopticon buffing the broader layout. It doesn’t happen every run, but targeting all three room lines simultaneously is the correct strategy.
My room got cut off from the path — is the run salvageable?
Check your Medallion reserve first. A Quipolatl’s Medallion can’t fix connectivity, but it can upgrade a lower-tier room to T3 elsewhere in the layout to recoup some value. If the Royal Access Chamber is still connected to the Architect’s Chamber, you can often reroute through alternate room paths. If not, complete the remaining incursions targeting whatever value is accessible — even a partial temple with one A-tier room yields meaningful returns. For guidance on routing your maps around this, see our endgame mapping guide.
Sources
- “PoE 2 0.4 Vaal Temple Cheat Sheet, Rewards, Rooms, Boss, Farm Strats” — aoeah.com
- “PoE 2 0.5 Vaal Temple to Core” — u4n.com
- “PoE2 Temple Guide” — poe2temple.blog
- “PoE2 Temple Cheat Sheet: Rooms, Connections & Upgrades” — poe2temple.blog
- “Incursion profit making strategy” — poe-vault.com
- “Vaal Temple Confirmed Permanent Core Mechanic in PoE2 0.5.0” — poecurrency.com
- “Path of Exile 2 Temple Guide” — overgear.com
- “Path of Exile 2 0.5.2 Patch Notes” — maxroll.gg
I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.